Area Forecast Discussion
Issued by NWS Boise, ID

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FXUS65 KBOI 201607

Area Forecast Discussion
National Weather Service Boise ID
1007 AM MDT Sun Aug 20 2017

.DISCUSSION...No update to the forecast for this morning. A high
cirrus shield over WA will transition across the area later today
and overnight, but should be clear of southeast Oregon and
southwest Idaho by 15Z Monday morning. Only other concern in the
short term will be smoke from large fires in w-central Oregon.
Smoke layers are expected to remain aloft and relatively thin over
the next 24 hours as winds through 10k feet MSL remain out of the
north to northwest.


.AVIATION...VFR with passing high clouds.  Smoke layers.  Surface
winds: generally west/northwest 10 kts or less. Winds aloft near
10 KFT MSL: west/northwest 10-15 kts.


SHORT TERM...Today through Tuesday...Dry northwesterly flow will
remain overhead in response to a passing mid/upper trough today.
Temperatures will be seasonable and cloud cover sparse. High
pressure is expected to build over the area Monday into Tuesday.
The Monday cloud cover forecast looks quite favorable for viewing
of a certain celestial may have heard one is coming. An
area of low pressure off the California coast will begin to push
moisture northward into the Great Basin late Tuesday. By Tuesday
afternoon isolated showers/thunderstorms will become a possibility
in SE Oregon and along the Nevada border.

LONG TERM...Tuesday night through Saturday...Southwesterly flow
ahead of an upper trough off the British Columbia coast will draw
moisture into our area for a chance of showers and thunderstorms
Wednesday through Thursday. The trough will track through southern
Canada and drag a cold front through our area Thursday night. Drier
weather will follow the front on Friday and accompany a building
upper ridge on Saturday. Temperatures will be above normal on
Wednesday and near normal Thursday through Saturday.





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